1、BS ISO 13473-5:2009ICS 17.140.30; 93.080.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDCharacterization of pavement texture by use of surface profilesPart 5: Determination of megatextureENNational forewordThis British Standard is the UK implementation of EN
2、ISO 13473-5:2009. It is identical to ISO 13473-5:2009. It supersedes BS ISO 13473-5:2009 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee B/510, Road materials, to Subcommittee B/510/5, Surface characteristics.A list of organizations represented on this
3、 subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN ISO 13473-5:2009
4、This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2009. BSI 2010ISBN 978 0 580 68843 0Amendments/corrigenda issued since publicationDate Comments 28 February 2010 This corrigendum renumbers BS ISO 13473-5:2009 as BS EN ISO 13473-5:2009E
5、UROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13473-5 December 2009 ICS 17.140.30; 93.080.20 English Version Characterization of pavement texture by use of surface profiles -Part 5: Determination of megatexture (ISO 13473-5:2009) Caractrisation de la texture dun revtement de chausse partir
6、 de relevs de profils de la surface - Partie 5: Dtermination de la mgatexture (ISO 13473-5:2009) Charakterisierung der Textur von Fahrbahnbelgen unter Verwendung von Oberflchenprofilen - Teil 5: Bestimmung der Megatextur (ISO 13473-5:2009) This European Standard was approved by CEN on 1 December 200
7、9. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained o
8、n application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management C
9、entre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Po
10、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by
11、 any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13473-5:2009: EForeword The text of ISO 13473-5:2009 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 13473-5:2009 by Te
12、chnical Committee CEN/TC 227 “Road materials” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2010, and conflicting national standards shall be withdr
13、awn at the latest by June 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the
14、 national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Nor
15、way, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 13473-5:2009 has been approved by CEN as a EN ISO 13473-5:2009 without any modification. EN ISO 13473-5:2009 (E)BS EN ISO 13473-5:2009 ISO 2009 All rights reserve
16、dii ISO 2009 All rights reserved iiiContents Page Introduction iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Significance and use of the megatexture indicators 6 5 Measurement and data processing principles 8 6 Test surface considerations 9 7 Measuring equipment. 9 8 Measure
17、ment method. 10 9 Data processing 12 10 Measurement uncertainty 15 11 Safety considerations during measurements 15 12 Test report . 16 Annex A (informative) Example of test report and graphical presentations 18 Annex B (informative) Measurement uncertainty . 24 Annex C (informative) Profile asymmetr
18、y issues 27 Bibliography . 29 EN ISO 13473-5:2009 (E)BS EN ISO 13473-5:2009 Introduction Pavement surface texture largely influences factors such as noise emission caused by tyre/road interaction (Reference 7), tyre/pavement friction (Reference 8), and comfort, as well as rolling resistance and wear
19、 of tyres. Reliable methods of texture measurement are therefore essential. Texture is subdivided into micro-, macro- and megatexture according to ISO 13473-2. A method for measurement and calculation of a macrotexture indicator based on a profile measurement is specified in ISO 13473-1. A procedure
20、 for measuring macrotexture by the volumetric patch method is described in ISO 10844:19942, Annex A. Currently, no reliable and practical method of measuring pavement microtexture in situ is available. This part of ISO 13473 aims to provide means of measuring and calculating megatexture indicators u
21、seful for pavement surface characterization. Megatexture is an important texture range lying between macrotexture and unevenness. This type of texture has wavelengths of the same order of magnitude as a tyre/road interface and is often a result of potholes or washboarding. Some common types of singu
22、larities, such as a single depressed or protruding spot on the pavement, will also show up in a texture profile spectrum as megatexture. Although some pavements, such as paving stones, possess an intrinsic megatexture, it is usually an unwanted characteristic resulting from defects in the surface. T
23、he scope of ISO 13473 (all parts) does not include profile analysis of road unevenness, which is dealt with in ISO 86081. EN ISO 13473-5:2009 (E)BS EN ISO 13473-5:2009 ISO 2009 All rights reserved ivINTERNATIONAL STANDARD EN ISO 13473-5:2009 (E) ISO 2009 All rights reserved 1Characterization of pave
24、ment texture by use of surface profiles Part 5: Determination of megatexture 1 Scope This part of ISO 13473 specifies procedures for determining the average depth or level of pavement surface megatexture by measuring the profile curve of a surface and calculating megatexture descriptors from this pr
25、ofile. The technique is designed to give meaningful and accurate measurements and descriptions of pavement megatexture characteristics for various purposes. Since there is an overlap between megatexture and the surrounding ranges, the megatexture descriptors unavoidably have a certain correlation wi
26、th corresponding measures in those ranges. This part of ISO 13473 specifies measurements and procedures which are in relevant parts compatible with those in ISO 13473-1, ISO 86081and EN 13036-56. 2 Normative references The following referenced documents are indispensable for the application of this
27、document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 13473-2:2002, Characterization of pavement texture by use of surface profiles Part 2: Terminology and basic requirements relat
28、ed to pavement texture profile analysis ISO 13473-3:2002, Characterization of pavement texture by use of surface profiles Part 3: Specification and classification of profilometers ISO/TS 13473-4:2008, Characterization of pavement texture by use of surface profiles Part 4: Spectral analysis of surfac
29、e profiles ISO/IEC NP Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters 3 Terms and definitions For the purposes of this part of ISO 13473, the terms and defi
30、nitions in ISO 13473-2, especially the following, apply. BS EN ISO 13473-5:2009 2 ISO 2009 All rights reserved3.1 General terms 3.1.1 pavement texture texture deviation of a pavement surface from a true planar surface, with a texture wavelength less than 0,5 m NOTE It is divided into micro-, macro-
31、and megatexture according to 3.2. ISO 13473-2:2002 3.1.2 surface profile texture profile two-dimensional sample of the pavement surface generated if a sensor, such as the tip of a needle or a laser spot, continuously touches or shines on the pavement surface while it is moved along a line on the sur
32、face NOTE 1 The profile of the surface is described by two coordinates: one in the surface plane, called “distance” (the abscissa), and the other in a direction normal to the surface plane, called “vertical displacement” (the ordinate). An example is illustrated in Figure 1. The distance may be in t
33、he longitudinal or lateral (transverse) directions in relation to the travel direction on a pavement, or any direction between these. NOTE 2 Adapted from ISO 13473-2:2002. NOTE 3 Texture profile is similar to surface profile but limited to the texture range. NOTE 4 “Texture wavelength” is a descript
34、or of the wavelength components of the profile and is related to the concept of the Fourier transform of a time series. However, mathematically the correspondence is not exact. Note that vertical displacement (height) has an arbitrary reference. Key 1 vertical displacement 2 profile 3 texture wavele
35、ngth 4 distance Figure 1 Illustration of some basic terms describing pavement surface texture 3.1.3 profilometer device used for measuring the profile of pavement surface NOTE 1 Current designs of profilometers used in pavement engineering include, but are not limited to, sensors based on laser, lig
36、ht sectioning, needle tracer and ultrasonics technologies. ISO 13473-2:2002 NOTE 2 Specifications for profilometers are dealt with in ISO 13473-3. BS EN ISO 13473-5:2009 EN ISO 13473-5:2009 (E) ISO 2009 All rights reserved 33.2 Ranges of texture 3.2.1 microtexture pavement microtexture deviation of
37、a pavement surface from a true planar surface with the characteristic dimensions along the surface of less than 0,5 mm, corresponding to texture wavelengths up to 0,5 mm expressed as one-third-octave centre wavelengths NOTE 1 Peak-to-peak amplitudes normally vary in the range 0,001 mm to 0,5 mm. Thi
38、s type of texture is the texture which makes the surface feel more or less harsh but which is usually too small to be observed by the eye. It is produced by the surface properties (sharpness and harshness) of the individual chippings or other particles of the surface which come in direct contact wit
39、h the tyres. NOTE 2 Figure 2 illustrates the different texture ranges, with approximate limits regarding their effects on vehicle-pavement interactions. ISO 13473-2:2002 Key texture wavelength fspspatial frequency, cycles/m NOTE A lighter shade indicates a favourable effect of texture over this rang
40、e, and a darker shade indicates an unfavourable effect. Figure 2 Ranges in terms of texture wavelength and spatial frequency of texture and unevenness and their most significant, anticipated effects BS EN ISO 13473-5:2009 EN ISO 13473-5:2009 (E)4 ISO 2009 All rights reserved3.2.2 macrotexture paveme
41、nt macrotexture deviation of a pavement surface from a true planar surface with the characteristic dimensions along the surface of 0,5 mm to 50 mm, corresponding to texture wavelengths with one-third-octave bands including the range 0,63 mm to 50 mm of centre wavelengths NOTE 1 Peak-to-peak amplitud
42、es may normally vary in the range 0,1 mm to 20 mm. This type of texture is the texture which has wavelengths of the same order of size as tyre tread elements in the tyre/road interface. Surfaces are normally designed with a sufficient macrotexture to obtain a suitable water drainage in the tyre/road
43、 interface. The macrotexture is obtained by suitable proportioning of the aggregate and mortar of the mix or by surface finishing techniques. NOTE 2 Based on physical relations between texture and friction/noise, etc., the World Road Association (PIARC), originally defined the ranges of micro-, macr
44、o- and megatexture (Reference 9). Figure 2, which is a modified version of the original PIARC figure, illustrates how these definitions cover certain ranges of surface texture wavelength and spatial frequency. Note that ride discomfort includes effects experienced in and on motorized road vehicles a
45、nd bicycles, as well as wheelchairs and other vehicles used by disabled people. NOTE 3 Adapted from ISO 13473-2:2002. 3.2.3 megatexture pavement megatexture deviation of a pavement surface from a true planar surface with the characteristic dimensions along the surface of 50 mm to 500 mm, correspondi
46、ng to texture wavelengths with one-third-octave bands including the range 63 mm to 500 mm of centre wavelengths ISO 13473-2:2002 NOTE Peak-to-peak amplitudes normally vary in the range 0,1 mm to 50 mm. This type of texture is composed of wavelengths with the same order of size as a typical tyre/road
47、 interface and is often created by potholes or ripples in the surface. It is usually an unwanted characteristic resulting from defects in the surface. Surface roughness with longer wavelengths than megatexture is referred to as unevenness and typically takes the form of undulations in the surface. 3
48、.2.4 unevenness pavement unevenness deviation of a pavement surface from a true planar surface with the characteristic dimensions along the surface of 0,5 m to 50 m, corresponding to wavelengths with one-third-octave bands including the range 0,63 m to 50 m of centre wavelengths NOTE 1 Pavement char
49、acteristics at wavelengths longer than 0,5 m are considered to be above that of texture and are referred to here as “unevenness”. For airfield applications, even wavelengths longer than 50 m would be considered. ISO 13473-2:2002 NOTE 2 Longitudinal unevenness is a type of surface roughness which, through vibrations, affects ride comfort in, and road holding of, vehicles. Transverse unevenness, e.g. due to the presence of ruts, affects safety through lateral instability and water accumulation. It is not t
